.select>input{
    width: 100%;
    height: 100%;
    border: none;

    /*可自定义*/
    border: 1px solid gray;
    border-radius: 5px;
    padding-left: 10px;
    font-size: 18px;
}
.select-option{
    margin: 0;
    padding: 0;
    width: 90%;
    display: none;

    /*可自定义*/
    margin-left: 3px;
    border-radius: 3px;
}
.select-option>li{
    list-style: none;
    overflow: hidden;
    width: 100%;

    /*可自定义*/
    background-color: orange;
    border-radius: 3px;
    padding-left: 5px;
    cursor: pointer;
    margin-top: 3px;
    height: 30px;
    padding-top: 5px;
}